The west side of Harrison Lake is underlain by rocks assigned to the Lower Cretaceous Brokenback Hill Formation, correlative with part of the Fire Lake Group (Journeay and Csontos, 1989; Lynch, 1990). Between Doctors Point and the Providence mine, the Brokenback Hill Formation includes mafic volcanic flows and tuffs, black argillite, volcanic sandstone, siltstone and rare, thin polymictic conglomerate. In this area, these rocks dip northeast and are believed to represent the northeast limb of major north trending anticline. Around Doctors Point, these rocks have been intruded by several high-level, dioritic plutons of Tertiary age.

In the vicinity of Davidson Creek, basaltic flows and tuffs host steeply dipping, gold-bearing quartz veins and silver-rich quartz-carbonate veins up to 91 centimetres wide. The latter veining is reported to have contained minor pyrite with associated low-grade gold values.

Four tunnels totalling over 210 metres were driven and two shafts with approximately 100 metres of development were sunk in an effort to follow this veining. The mine's only recorded production occurred in 1896 when 4665 grams of gold was recovered from 91 tonnes of ore. Reports of a 318 tonne shipment of ore assaying $37.49 per tonne (56.40 grams per tonne gold equivalent) to Tacoma from the period 1898-1899 have not be authenticated (Minister of Mines Annual Report 1929, page C399).